Remove the check for stat()

It's POSIX-2001 standard

CMakeLists.txt

@@ -447,8 +447,6 @@ CHECK_SYMBOL_EXISTS(posix_memalign   stdlib.h HAVE_POSIX_MEMALIGN)
 CHECK_SYMBOL_EXISTS(_aligned_malloc  malloc.h HAVE__ALIGNED_MALLOC)
 CHECK_SYMBOL_EXISTS(proc_pidpath     libproc.h HAVE_PROC_PIDPATH)
 
-CHECK_FUNCTION_EXISTS(stat HAVE_STAT)
-
 IF(NOT WIN32)
     # We need pthreads outside of Windows, for semaphores. It's also used to
     # set the priority and name of threads, when possible.

alc/backends/oss.cpp

@@ -674,10 +674,8 @@ void OSSBackendFactory::probe(DevProbe type, std::string *outnames)
 {
     auto add_device = [outnames](const DevMap &entry) -> void
     {
-#ifdef HAVE_STAT
         struct stat buf;
         if(stat(entry.device_name.c_str(), &buf) == 0)
-#endif
         {
             /* Includes null char. */
             outnames->append(entry.name.c_str(), entry.name.length()+1);

alc/backends/solaris.cpp

@@ -276,10 +276,8 @@ void SolarisBackendFactory::probe(DevProbe type, std::string *outnames)
     {
         case DevProbe::Playback:
         {
-#ifdef HAVE_STAT
             struct stat buf;
             if(stat(solaris_driver.c_str(), &buf) == 0)
-#endif
                 outnames->append(solaris_device, sizeof(solaris_device));
         }
         break;

config.h.in

@@ -74,9 +74,6 @@
 /* Define if we have the SDL2 backend */
 #cmakedefine HAVE_SDL2
 
-/* Define if we have the stat function */
-#cmakedefine HAVE_STAT
-
 /* Define to the size of a long int type */
 #cmakedefine SIZEOF_LONG ${SIZEOF_LONG}